20136254 has 4 divisors (see below), whose sum is σ = 30204384. Its totient is φ = 10068126.

The previous prime is 20136241. The next prime is 20136301. The reversal of 20136254 is 45263102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45263102 = 2 ⋅22631551.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5034062 + ... + 5034065.

It is an arithmetic number, because the mean of its divisors is an integer number (7551096).

Almost surely, 2^20136254 is an apocalyptic number.

20136254 is a deficient number, since it is larger than the sum of its proper divisors (10068130).

20136254 is a wasteful number, since it uses less digits than its factorization.

20136254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10068129.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20136254 is about 4487.3437577257. The cubic root of 20136254 is about 272.0567842086.

Adding to 20136254 its reverse (45263102), we get a palindrome (65399356).

The spelling of 20136254 in words is "twenty million, one hundred thirty-six thousand, two hundred fifty-four".